Compensating pump rod



(N0 Model.) 1 v 1 T W*-H -"BURNHAM &'J. H. MILLER.

GOMPENSATING PUMP ROD.

N 381. 211." 'PatentedApr. 17, 18 8-;-

A TTOHNEY WILLIAM H. BURNHAM AND JOHN MILLER, 0E BATAVIAIILLINDIS,

nssreNons TO THE UNITED srn'r s WIND ENGINE AND PUM c M-S I PANY, oE'sAM PLACE.

COM PENSATING Pu M P-"R o n.

SPECIFICATION forming part of Letters Patent No. 381,211, dated A rn 17, 1888.

Application filed Noveniherl4,1887. Serial No. 955,03 7.- (No model.)

. To all whom it may concern.-

Be'it known that we, WILLIAM" H.'BURN- HAM and JOHN J1. MILLER, citizens of the United States, and residents of Batavia, in the county of Kane and State of Illinois, .have invented new and useful Improvements in Oompensating Attachmentsfor Pump-Rods, of

ma mi.

which the-following is afspecificatio'n, reference being had to the accompanying drawings illustrating the invention,.in which- Figure 1 is a vertical sectional elevation of sating device; Fig. 2, a verticalsectional elevation of the lower portion of the same, the full length of the attachment being shown by abutting the top end of Fig. 2 against the bottom end of Fig. 1'. Fig. 3 isa horizontal section of Fig. 2.0m line at; and Fig. 41s ahorizontal section of Fig. 1 on line 2, both sections having substantially, the same contour.

Thepurpose of this invention is to prevent pumps, when obstructed, from being injured by the action of thepump rod driven bya windmill orother non-yielding power. The best means we have found to attain this end isa pump-rod made in two parts, with a section of coil-spring placed between the separated ends thereof,and the two-part rod, provided with means to keep it in line'at the place of the spring-connection, andat the same time permit the rod to shorten or lengthen by means of the spring should the pump meet with an.

obstruction which would afford a=greaterresistance than that necessary to beovercome in raising water. One method of carrying our invention into practice is as follows: J represents a broken section of the lower metal portion,,to which the lower part of the pump-rod is to 'beattached. Cast solid to the part J is a socket guide portion, H, which, as shown in horizontal section at Fig. 3, is annular in exterior contour, and has an interior contour corresponding to but a trifle-larger.

than the exterior contour of the armed guide washerD b. The upper rod casting, K, has

cast solid to its lower end a core, 0, as shown in horizontalsection, Fig. 4, of the same gen-- eral form or exterior contouras the guidewasher D b at Fig. 3, and'the nut I has an internal contour to, fitthe external contour of the core 0, so that the core maybe properly guidedin the vertical reciprocating movement j eter, is formed ascrew-thread, N, andon ith e top part of the guide portion H is formed a screw-thread, L, whereby a cylindrical pi esectiom F, providedwith an internal sc'r'ew- 1 threadat each end, is made to connect the nut I and guide portion H and hold the rod-attachthe upper portion of our improved cornpening portionsJ K in line. A coil-spring, -A,

of suitable strength toworkthe pu'mp,isplaced' of the spring and the arms b of washer D pro jecting under it. 7 in the core O, and extends through the guide- A rod, B, is rigidly secured washer D, and on its lower end is turned a nut,

,on the core G is a cylindrical housing, E,whieh passes loosely over the larger part ofthe nut' I, so as to slide downthereon'when the spring A is compressed. The function of the part E is simply to protect theother parts from snow,

term a cushioned rod-.1 It will operate a' pump asw'ell as a continuous rod; but should "the pump become obstructed during the downward movement of the rod, so that the use of F anon-yielding rodwould do damage, the

springA will be compressed, the guide-washer Db and nutG passing. down'into the guide portion H. Should .thefpump become obstructed during the upward movement of the f rod, the spring willalso be compressed by the upward movement of the guide-washer D and G. v v g It is obvious that our invention ma'yQbe embodied in equivalent mechanism, and that all" that is required, is the rod-attaching portions J -K,v the spring A, and means for holding the rodin line,so that the lower-part may-have a proper free movement toand froln the upper. part. 'To keep the rod in. line and-provide suitable "guides, we employ the cylinder-com nection F, nut I, guide-washer D b, nut G, and

- UNI E Z TA E i between the end of the nut I and guidepart H, the arms d of the core 0 lying on the top end I v rain andice.. This construction is what we guide portion H; but we do not confine our 2. The nuts G I, washer D b, in' combinaselves to the form shown. tion with thespring A, rod B, and rod-attach- We claim as new and desire to secure by ing portion J K, for keeping the two-part Letters Patent-- pump-rod in line, as specified. 1. In cushioned pump-rods, the upper rodattaching portion, K, having the core 0 as a WILLIAM H. BURNHAM. v z partthereof, and the lower'rod-attaching por- JOHN H. MILLER.

tion, J, having the guide-connection H as a part thereof, in combination with the washer Witnesses:

| D b, nut G, rod B, nut I, spring A, and case 0. D. WALWORTH,

F, as and for the purpose specified. W. S. DERBY. 

